. >> cindy tran had four sons ranging in age from 14 to 21. her friends set up a fund for the boys. they say cindy was a devoted mother. live in vallejo, amy hollyfield, abc7 news. >> thank you. >>> police believe he also may have killed salas' son frederick. he is still missing. investigators searched a pittsburgh landfill looking for any evidence, and they will be back first thing in the morning combing through that. the landfill handles trash from a business park where he worked. investigators also found salas' suv. they say there was no trace of him and no indication that any crime was committed in the vehicle. meantime, a court appearance today by the husband of one of the other two murder victims connected to this case. 72-year-old charles rittenhouse pleaded not guilty to two counts of possessing explosives including dynamite, and the military explosive c4. he remains in custody on $2 million bail. it was set high because the vallejo police expect rittenhouse may have something to do with the murder of his wife and her friend. police say he was living in the home with the wom